A matter wave Rarity-Tapster interferometer to demonstrate non-locality

• URL: http://arxiv.org/abs/2206.08560v3
• Date: Wed, 13 Sep 2023 05:04:06 GMT
• Title: A matter wave Rarity-Tapster interferometer to demonstrate non-locality
• Authors: Kieran F. Thomas, Bryce M. Henson, Yu Wang, Robert J. Lewis-Swan, Karen V. Kheruntsyan, Sean S. Hodgman, Andrew G. Truscott
• Abstract summary: We present an experimentally viable approach to demonstrating quantum non-locality in a matter wave system via a Rarity-Tapster interferometer. We use two $s$-wave scattering halos generated by colliding helium Bose-Einstein condensates.
• Score: 1.9372327646250074
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present an experimentally viable approach to demonstrating quantum non-locality in a matter wave system via a Rarity-Tapster interferometer using two $s$-wave scattering halos generated by colliding helium Bose-Einstein condensates. The theoretical basis for this method is discussed, and its suitability is experimentally quantified. As a proof of concept, we demonstrate an interferometric visibility of $V=0.42(9)$, corresponding to a maximum CSHS-Bell parameter of $S=1.1(1)$, for the Clauser-Horne-Shimony-Holt (CHSH) version of the Bell inequality, between atoms separated by $\sim 4$ correlation lengths. This constitutes a significant step towards a demonstration of a Bell inequality violation for motional degrees of freedom of massive particles and possible measurements of quantum effects in a gravitationally sensitive system.

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